Incidents, like buses, often come along together and over the first few races of this season pitstops and wheel retention have become a focus of both the teams and the FIA. It started on the very first morning of pre-season testing when McLaren lost a wheel on Alonso's car. The incidents continued through the Haas debacle in Australia, the unfortunate accident that befell Ferrari in Bahrain, and a number of less visible episodes during practice at later grands prix (in Spain, for instance, Sergio Perez left his box without all his wheels attached properly during Free Practice 2).
Many articles have been written about the choreography involved in pitstops but little about the automation and safety of them, although the systems employed have achieved a level of sophistication that may surprise many viewers.
The sub-two-second pitstop is an amazing achievement and one doesn't have to look too far back to see that progress has been rapid and spectacular since refuelling was banned for 2010. Before this, with refuelling taking a leisurely six or seven seconds even for a three-stop race, the return on investment for fast wheel changes was negligible. It was more important to ensure that the task was carried out safely and correctly.